Celebrity demands free housing for ever (5)
I believe the answer is:
rider
'celebrity' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'free housing for ever' is the wordplay.
'free' becomes 'rid' (to be free of something is to be rid of it).
'housing for ever' becomes 'er' (I can't justify this - if you can you should give a lot more credence to this answer).
'rid'+'er'='RIDER'
'demands' is the link.
Can you help me to learn more?
(Other definitions for rider that I've seen before include "Equestrian added by a jury?" , "One may be saddled" , "Legal document's additional clause" , "Condition added to a legal document" , "qualification" .)